Aliphatic acids containing an arsenoarylamin group.



UNITED STATES PATENro mc KARL J. OECHSLIN, OF PARIS, FRANCE.

ALIPHATIC ACIDS CONTAINING AN ARSENOARYLAMINGROUP.

No Drawing,

To all whom it may concern: a

Be it known that I, KARL'JAGoB OEo s- LIN, citizen of the Swiss Confederation, residing at Paris, in the Republic of France,

have invented certain new and useful I mprovements in Aliphatic Acids Contammg an- Arsenoary'lamin' Group, ofwhich the following is an exact and complete description.

Arsenophenylglycin (z'. 6., the p. compound) is a well-known substance which may be Widely employed but its great instability is a considerable disadvantage both in its preparation and use. 7

I have found that by causingformaldehyde to react on this substance or on its derivatives products are obtained which exhibit great'stability. either as salts or as free acids.

The invention is also applicable toother similar arseno aryl derivatives of az-aminoaliphatic acids of the general formula COOH.GH,.NH NHcmcoQH.

(in which the aryl or the CH group of the glycin .may be substituted) or to salts of these bodies- The aldehyde may also be added to a solution containing the arsenophenylglycerin and in which it has been prepared before its isolation therefrom.

Example; Arsenophenylglycerin,- dissolved in a not too concentrated solution of sodium carbonate (for example, 6%), is

treated with formaldehyde in amounts,

which may vary withinwide limits thus, to a substantially concentrated solution of the arsenophenylglycerin in sodium car-- bonate solution an almost equal volume of.

40% formaldehyde solution may be added. From the resulting solution alcohol or ace- Specmcation of Letters Patent.

I Application filed March 4, 1915. Serial No. 12,086.

apeutic products by causing to react with an arsenoaryl derivative of an Patented Apr. 1, 1919.

interaction between formaldehyde and a body containing the grouping 2. The process of preparing stablg the;-

I'mal ehy e .a-aminoaliphatic acid.

' 3. The process of preparing a stable therapeutic product WhlCh consists in treating arsenophenylglycin with formaldehyde;

4. As new products, the light yellow stable formaldehyde derivatives of p-arse noar l-a-aminoaliphatic acids, such as .can be 0 tained by the action of formaldehyde on said acids. i

5. As a new product, the light yellow stable formaldeh de derivativeof arsenophenylglycin, sue as can be obtained by the 'interaction of formaldehyde on arsenophenylglycin. In witness whereof I have hereunto signed my name this 1st .day of February,1915, in

the presence of two subscribing witnesses. K. J. OECHSLIN.

Witnesses: Dav n C. Poomc, Jn, G. F. WADLIN. 

